663518441263 has 8 divisors (see below), whose sum is σ = 692469155808. Its totient is φ = 634576233984.

The previous prime is 663518441251. The next prime is 663518441291. The reversal of 663518441263 is 362144815366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-663518441263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663518441363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1967170 + ... + 2279647.

It is an arithmetic number, because the mean of its divisors is an integer number (86558644476).

Almost surely, 2^663518441263 is an apocalyptic number.

663518441263 is a deficient number, since it is larger than the sum of its proper divisors (28950714545).

663518441263 is a wasteful number, since it uses less digits than its factorization.

663518441263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4253633.

The product of its digits is 2488320, while the sum is 49.

The spelling of 663518441263 in words is "six hundred sixty-three billion, five hundred eighteen million, four hundred forty-one thousand, two hundred sixty-three".